# Pool detail · HyperEVM API · Femtos

> One pool: dex, fee, tokens, liquidity in USD, depth, 5m to 24h activity, top LPs.

- Base URL: `https://api.femtos.xyz/v1` (REST) · `wss://api.femtos.xyz/v1/ws` (WebSocket) · MCP: `https://api.femtos.xyz/mcp`
- Auth: `Authorization: Bearer $FEMTOS_KEY`. Free key: https://femtos.xyz/accounts/ (browser), or with
  no browser: `GET https://femtos.xyz/accounts/agent/challenge`, solve its proof of work, then `POST https://femtos.xyz/accounts/agent/signup`
  (https://femtos.xyz/agents.md#agent-onboarding)
- Decimals are exact strings, times Unix milliseconds, addresses lowercase `0x`
- Whole API in one file: https://femtos.xyz/agents.md · OpenAPI: https://api.femtos.xyz/v1/openapi.json · Index: https://femtos.xyz/llms.txt
- Page with live calls: https://femtos.xyz/hyperevm/pool

## Pool detail — GET `/v1/pools/{address}`

One pool: dex, fee, tokens, liquidity in USD, depth, 5m to 24h activity, top LPs.

| Param | In | Example or values | Meaning |
|---|---|---|---|
| `address` | path | `<evmPair>` | Pool address, or <PoolManager>:<PoolId> |
| `layer` | query | `hyperevm` | EVM layer |

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/pools/<evmPair>?layer=hyperevm"
```

| Field | Type | Meaning |
|---|---|---|
| `dex` | string | Protocol |
| `factory` | string | Factory / PoolManager |
| `feeTier` | int \| null | Fee tier (hundredths of a bip: 500 = 0.05 %) |
| `tickSpacing` | int \| null | Tick spacing |
| `hooks` | string \| null | V4 / Infinity hooks contract |
| `token0` | object | token0: {address, symbol, name, decimals, priceUsd, spam, spamReason} |
| `token1` | object | token1: {address, symbol, name, decimals, priceUsd, spam, spamReason} |
| `liquidity` | object \| null | What the pool holds; null when unknown (a vault pool without L, e.g. Balancer): {method, exact, amount0, amount1, amount0Raw, amount1Raw, usd, partial, at, block} |
| `depth2pct` | object \| null | Concentrated pools: depth to ±2 % from L and √P: {approx, up, down, liquidity, sqrtPriceX96, block} |
| `windows` | object | From the candle tables: 5m / 1h from 1 min candles, 6h from 5 min, 24h from 1 h; a window starts at its first candle at or after head − length: {5m, 1h, 6h, 24h} |
| `topLps[]` | object \| null | V2-style pools with at most 2000 LP holders: the 10 largest: {address, balanceRaw, share, burned} |
| `lpHolders` | int \| string \| null | V2-style pools: holders of the LP token (">2000" when more); null otherwise |
| `block` | int | Creation block (provenance) |
| `tx` | string \| null | Creation transaction (pool-created event in that block) |
| `lastSwap` | object \| null | The pool's last swap (provenance of the state): {block, t, tx, logIndex} |

## Related (Market data)

- [Markets](https://femtos.xyz/hyperevm/markets.md): Active HyperEVM pools with 24 h stats.
- [Candles](https://femtos.xyz/hyperevm/candles.md): OHLCV of one pool in pair price, USD and market cap, ascending, UTC-aligned.
- [Forming candle](https://femtos.xyz/hyperevm/ws-candles.md): The forming candle, pushed once per block where it changes.
- [Trades](https://femtos.xyz/hyperevm/trades.md): Latest swaps of one pool, newest first.
- [Trades stream](https://femtos.xyz/hyperevm/ws-trades.md): The swaps of one pool, one message per block that has some.
- [Swaps by wallet](https://femtos.xyz/hyperevm/wallet-trades.md): Every swap a wallet sent (or a pool’s, a token’s), newest first, filterable by token, side, size and time.
- [Transfers by wallet](https://femtos.xyz/hyperevm/wallet-transfers.md): ERC-20 transfers sent and received by a wallet, newest first, filterable by token, direction, size and time.
- [Transaction](https://femtos.xyz/hyperevm/tx.md): One transaction: status, gas, decoded transfers, swaps and liquidity, bridge legs and journey.
- [Token prices](https://femtos.xyz/hyperevm/prices.md): USD price of up to 100 tokens in one call, each with its source and provenance.
- [Price history](https://femtos.xyz/hyperevm/price-history.md): USD closes per unit of up to 25 tokens over a window, or the price of 100 tokens at one time (at=).
- [Token candles](https://femtos.xyz/hyperevm/token-candles.md): OHLCV of a token in USD through its reference pool, the most liquid one.

All HyperEVM endpoints: https://femtos.xyz/hyperevm.md